package com.personal.system.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * 定义线程池，交给spring管理
 */
@Configuration
@EnableAsync
public class ThreadPoolConfig {

    @Bean
    public Executor asyncExecutor() {
//        MyThreadPoolTaskExecutor executor = new MyThreadPoolTaskExecutor();
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 核心线程数5：线程池创建时候初始化的线程数
        executor.setCorePoolSize(5);
        // 最大线程数5：线程池最大的线程数，只有在缓冲队列满了之后才会申请超过核心线程数的线程
        executor.setMaxPoolSize(5);
        // 缓冲队列500：用来缓冲执行任务的队列
        executor.setQueueCapacity(500);
        // 允许线程的空闲时间60秒：当超过了核心线程出之外的线程在空闲时间到达之后会被销毁
        executor.setKeepAliveSeconds(60);
        // 线程池名的前缀：设置好了之后可以方便我们定位处理任务所在的线程池
        executor.setThreadNamePrefix("asyncTaskName-");
        // 异步任务时设置主线程数据到上下文,保证线程ID一致
        executor.setTaskDecorator(new MdcTaskDecorator());
        // 对拒绝任务的策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }

}
